Rayleigh lidar temperature profiles between 15-60 km during SOLAR campaign in Río Gallegos (51º55 ´s, 69º14´w), Argentina: methodology and results

SALVADOR, JACOBO; WOLFRAM, ELIAN; D´ELÍA, RAÚL; GODIN-BEEKMAN, SOPHIE; QUEL, EDUARDO

St. Petersburg

Conferencia; 25th ILRC; 2010

Since 2005 the lidar division of CEILAP withresearchers from France and Japan and with thefinancial support of JICA (Japanese InternationalCooperation Agency) conducted the installation of anexperimental site measurements of atmosphericparameters in the Patagonian city of Rio Gallegos insouthern Argentina.The measurement campaignperiod from 2005 to 2007 was called SOLAR(Stratospheric Ozone Lidar in ARgentina). The mainobjective was to study the evolution of the polarvortex on the continent and the stratospheric ozoneprofile between 15-45 km altitude . In 2006 we beganto obtain other products such as aerosol content andtemperature profile in the stratosphere. Thedetermination of temperaturemeasurements fromRayleigh scattering is an important remote sensingtechnique to obtain stratosphericprofiles. Thistechnique is applied to signals acquired by a lidar (Light Detection and Ranging) called DIAL(Differential Absorption Lidar) for determination ofstratospheric ozone profiles. Currently the site is part of the UVO3Patagonia in collaboration with thelaboratory of Ozone and UV Radiation in the city ofPunta Arenas, Chile at 200 km,www.uvo3patagonia.com. In this paper we show thetechnique to measure temperature profiles in thestratosphere between 15-60 km altitude. The inversion temperature from photoncounting isdetected from light scattered by the Rayleigh line at355 nm generated from a Quantel YG-980 laser. Ananalysis of the errors involved in the inversionprocess and analysis of a case of study are shown fortheperiod 2005-2007. The results presented in thispaper are compared with measurements made byHIRDLS instrument (High Resolution DynamicsLimb Sounder) onboard the NASA AURA satellite platform, Ballonborne and NCEP database.